Reinforcement cage for concrete forming

The invention discloses a reinforcement cage for concrete forming, and belongs to the technical field of concrete.The reinforcement cage comprises an inner ring composed of a plurality of inner supporting rods and an outer ring composed of a plurality of outer supporting rods, a plurality of inner rings are arranged outside the inner supporting rods in the length direction of the inner ring, and the inner rings are fixedly connected with the inner supporting rods; the outer supporting rods are sleeved with a plurality of outer rings with the variable diameters in the length direction of the outer ring, and the multiple outer supporting rods can move towards the outer side in the direction away from the center axis of the outer rings. A circular channel is formed in the middle of the inner ring, an inner cylinder capable of sliding in the circular channel is installed in the channel, and the inner cylinder can convey concrete raw materials from the tail of the reinforcement cage to the end of the reinforcement